So I'm starting a new project, trying to light up 3 LEDs with one push button kind of like a sequencer. However, I don't want the previous LEDs to shut off, but instead, just have the next one turn on with the push of a button. I was thinking this would be better done with a microprocessor instead of a controller, but I'm still new to this side of the tech world. Any suggestions as to what I should do?